Ghost is right - a court is going to decide, and the things that are going to decide if you get to court in the first place is what kind of target you are. Own a house? Have a decent job? Some cash in the bank? You have a bullseye on your back. Consider checking your umbrella coverage before you hit the slopes (yes, that's part of my gripe about access being restricted)
Have a ton of debt? No assets? Lousy credit score? Probably doesn't matter how at-fault you were, the plaintiff isn't going to get a lawyer on contingency to take that case to trial. Most will be looking to get their client a modest out-of-court settlement, with minimal hours dedicated to the case.
In the end, if your wealthy enough to pad the pockets of insurance companies and/or lawyers as part of enjoying your skiing, there's no problem. If your a charity case who traded in your food stamps for some used skis, you also have no problem. But if you fall into that swath of average middle class guy out to enjoy one of the most trilling sports around, well, you may setting yourself up for a raw deal.
A few things to remember also. When you ski out west you have to appear in court out west. And laws, including case law, vary from state to state. Colorado (as a "family ski destination state") has one of the most litigation favourable set of laws out there, and don't think it's a coincidence that skiing is a major share of their economic activity. Here's a somewhat dated piece on Colorado law if your interested: Ski Law in Colorado: The Timorous No Longer Stay Home
And superficial appearances can matter more than the actual facts. What do you think your chances are in front of a jury of local folks who have to listen for hours about the poor local guy who is nos in a wheelchair? If the other guys lawyer can make you look / sound like the "stereotypical 20-something reckless ex-racer from out of state", you are toast. (Don't believe it - just look at how quick people on this forum who know absolutely nothing about me beyond speculation and conjecture are ready to accuse me of beating up poor defenceless grannies!)
Finally, I want to reiterate from an earlier post that the worst thing you can do is leave the scene. Regardless of what did or didn't happen, if you leave the scene, people will automatically think you were doing something wrong. Often that's not so - you just might be young / immature and afraid to present your side of things. In that case contact your parents and tell ski patrol you are too shaken up and want your parents (or you want to see a medic). Have them take you down the hill in the sled to the patrol office if necessary - they may just offer to ski down with you, but you can insist you need the sled, even if you think your OK. You can always change your mind and decline the sled later. Use the time to regain your composure. You don't have to be pressured to "admitting anything" on the hill. For example, you might think it helps your case to say that you are an expert skier, but in fact you may be subjecting yourself to a higher "expert" standard of care and controlled skiing.